letter = ['a', 'b', 'c', 'd', 'e']
print(letter[0:3])
print(letter[1:4])
print(letter[-3:])
print(letter[2:])

letters = ['a', 'b', 'c', 'd', 'e']
for letter in letters[:3]:
    print(letter)

numbers = [1, 2, 3, 4, 5, 6]
my_numbers=numbers[:]
print(numbers)
my_numbers.append(555)
print(my_numbers)

dimen=(100,50,60)
print(dimen[1])
print(dimen[2])
# dimen[0]=1
for d in dimen:
    print(d)